应用生态学报2013，Vol.24Issue(3)：839-846,8.
增施CO2对植物修复土壤DEHP污染的影响
Effects of enhanced CO2 fertilization on phytoremediation of DEHP-polluted soil
摘要
Abstract
Low efficiency of remediation is one of the key issues to be solved in phytoremediation technology.Based on the necessity of reducing CO2 emission in China and the significance of CO2 in plant photosynthesis, this paper studied the effects of enhanced CO2 fertilization on the phytoremediation of polluted soil, selecting the C3 plant mung bean ( Vigna radiate) and the C4 plant maize (Zea mays) as test plants for phytoremediation and the DEHP as the target pollutant.DEHP pollution had negative effects on the growth and rhizosphere micro-environment of the two plants.After enhanced CO2 fertilization, the aboveground dry mass of the two plants and the alkaline phosphatase activity in the rhizosphere soils of the two plants increased, the COD activity in the leaves of the two plants decreased, the microbial community in the rhizosphere soils shifted, and the numbers of the microbes with DEHP-tolerance in the rhizosphere soils increased.These changes indicated that enhanced CO2 fertilization could promote the plant growth and the plant tolerance to DEHP stress, and improve the rhizosphere micro-environment.Enhanced CO2 fertilization also increased the DEHP uptake by the two plants, especially their underground parts.All these effects induced the residual DEHP concentration in the rhizospheres of the two plants, especially that of mung bean, decreased obviously, and the phytoremediation efficiency increased.Overall, enhanced CO2 fertilization produced greater effects on C3 plant than on C4 plant.It was suggested that enhanced CO2 fertilization could be a useful measure to enhance the efficiency of phytoremediation.关键词
植物修复/DEHP/增施CO2/残留浓度Key words
phytoremediation/ DEHP/ enhanced CO2 fertilization/ residual concentration分类
资源环境引用本文复制引用
刁晓君,王曙光,慕楠..增施CO2对植物修复土壤DEHP污染的影响[J].应用生态学报,2013,24(3):839-846,8.基金项目
中央高校科研业务费专项(ZZ1106)资助. （ZZ1106）
